Mainstays Twin Over Twin Wood Bunk Bed, Pine Easily converts to 2 twin beds if you no longer want them stacked Kids' bunk bed designed to be used with standard twin-sized coil spring mattresses only (not included) Features guard rails on the top bunk and an integrated 4-step ladder for safety Solid wood construction for enhanced durability and safety Mainstays twin over twin wood bunk bed is available in multiple finishes and requires assembly